A method for assembling shaft-connected bearings using tooling

Abstract

The present application discloses an assembly method for a shaft-connected bearing using a tool, comprising: using a first tool to install a first steel ball into a first raceway formed by a first core shaft and a first outer ring; taking out the first core shaft with the first outer ring and the first steel ball from the first tool, and flipping it to generate a second core shaft assembly; assembling the second core shaft assembly to generate a third core shaft assembly; installing the third core shaft assembly into a second tool, and applying a predetermined pressure to the third core shaft assembly using the third tool; using a fourth tool to install the second steel ball into a second raceway formed by the third core shaft assembly and the second outer ring; replacing the fourth tool with a second C-shaped component; and generating a shaft-connected bearing.

Description

Technical Field

[0001] The present application relates to the field of bearing manufacturing, and in particular to an assembly method for assembling a shaft-connected bearing using tooling. Background Art

[0002] As a type of rotary structure, shaft-connected bearings have smaller radial dimensions than conventional bearings for the same load capacity. However, for the same radial dimensions, they have greater load capacity than conventional bearings. Due to their excellent rigidity and high rotational accuracy, they are widely used in a variety of industries, including medical equipment, automotive water pumps, textile machinery, and aerospace.

[0003] With the increasing popularity and development of medical CT (i.e., X-ray computed tomography) imaging technology, the performance parameters and quality indicators of CT tubes—the main output device for X-rays—are being put to greater test than ever before. Bearings, as key components within the tube, play a vital role in improving CT tube performance. Bearings in CT tubes are generally of two types: liquid metal bearings and ball bearings. Ball bearings are generally designed to P4 grade and are high-speed, high-precision bearings that place extremely high demands on their design, processing, and assembly. Ball bearings are classified according to the preload method into either a positioning preload structure or a constant pressure preload structure.

[0004] However, since the existing shaft-connecting bearings often cannot ensure coaxiality during the assembly process, it often causes difficulty in rotation, thereby affecting the service life of the shaft-connecting bearings.

[0005] With respect to the technical problem in the above-mentioned prior art that the existing shaft-connecting bearings often cannot ensure coaxiality during the assembly process, thereby causing difficulty in rotation and further affecting the service life of the shaft-connecting bearings, no effective solution has been proposed so far. Summary of the Invention

[0006] The present disclosure provides an assembly method for shaft-connected bearings using tooling to at least solve the technical problem in the prior art that existing shaft-connected bearings often cannot ensure coaxiality during the assembly process, thereby causing difficulty in rotation and affecting the service life of the shaft-connected bearings.

[0007] According to one aspect of the present application, a method for assembling a shaft-connected bearing using a tool is provided, comprising: using a first tool to install a first steel ball into a first raceway formed by a first core shaft and a first outer ring, wherein the first tool is a shell provided with a first cavity and a vent hole provided at the bottom; taking out the first core shaft with the first outer ring and the first steel ball from the first tool, and flipping it to generate a second core shaft assembly; assembling the second core shaft assembly to generate a third core shaft assembly, wherein the third core shaft assembly is a core shaft assembly with a spring; installing the third core shaft assembly into a second tool, and applying a predetermined pressure to the third core shaft assembly using the third tool, wherein the second tool is a shell provided with a second cavity, and the third tool is a sleeve with a protrusion; using a fourth tool to install the second steel ball into a second raceway formed by the third core shaft assembly and the second outer ring, wherein the fourth tool is a first C-shaped component provided with a step; replacing the fourth tool with the second C-shaped component; and generating a shaft-connected bearing.

[0008] Because the disclosed technical solution first uses a first tool to install the first steel ball into the first raceway formed by the first mandrel and the first outer ring, and then flips the first mandrel with the first outer ring and the first steel ball to form the second mandrel assembly, the first steel ball is precisely positioned at the predetermined position on the first mandrel, and the size of the first raceway between the first outer ring and the first mandrel matches the diameter of the first steel ball. Furthermore, after the third mandrel assembly is installed in the second tool, a predetermined pressure is applied to the third mandrel assembly using the third tool to precisely position the third mandrel assembly. Therefore, the second raceway formed by the third mandrel assembly and the second outer ring matches the size of the second steel ball. Consequently, the coaxiality between the first and second steel balls is improved, and the first steel ball is less susceptible to wear in the first raceway, and the second steel ball is also less susceptible to wear in the second raceway. Thus, this operation ensures the coaxiality of all components of the shaft-connected bearing, thereby ensuring the normal operation and service life of the shaft-connected bearing. This solves the technical problem in the prior art that the existing shaft-connecting bearings often cannot ensure coaxiality during the assembly process, causing difficulty in rotation and thus affecting the service life of the shaft-connecting bearings.

[0009] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0011] Figure 1 This is a flow chart of an assembly method for assembling a shaft-connected bearing using a tool according to an embodiment of the present application;

[0012] Figure 2 is a structural schematic diagram of a first tooling with a first mandrel installed according to an embodiment of the present application;

[0013] Figure 3 is a structural schematic diagram of a first core shaft equipped with a first steel ball according to an embodiment of the present application;

[0014] Figure 4 is a structural schematic diagram of a second mandrel assembly according to an embodiment of the present application;

[0015] Figure 5 is a structural schematic diagram of a second tooling with a third spindle assembly installed according to an embodiment of the present application;

[0016] Figure 6 is a structural schematic diagram of a third core shaft assembly equipped with a second outer ring according to an embodiment of the present application;

[0017] Figure 7 is a structural schematic diagram of a third core shaft assembly equipped with a second steel ball according to an embodiment of the present application; and

[0018] Figure 8 It is a structural schematic diagram of the fourth tooling according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present disclosure.

[0021] It should be noted that the terms "first," "second," and the like in the specification and claims of the present disclosure and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present disclosure described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Figure 1 This is a flow chart of a method for assembling a shaft-connected bearing using a tool according to an embodiment of the present application. Figure 2 2 is a schematic structural diagram of a first tool 10 with a first core shaft 220 installed according to an embodiment of the present application. Figure 3 2 is a schematic structural diagram of a first core shaft 220 with a first steel ball 210 installed thereon according to an embodiment of the present application. Figure 4 is a structural diagram of the second spindle assembly 20 according to an embodiment of the present application, Figure 5 1 is a structural diagram of a second tool 40 equipped with a third spindle assembly 30 according to an embodiment of the present application. Figure 6 3 is a schematic structural diagram of a third core shaft assembly 30 equipped with a second outer ring 330 according to an embodiment of the present application. Figure 7 is a structural diagram of the third core shaft assembly 30 with the second steel ball 320 installed according to the embodiment of the present application and Figure 8 2 is a schematic structural diagram of the fourth tooling 60 according to an embodiment of the present application.

[0024] refer to Figure 1 As shown, a method for assembling a shaft-connected bearing using a tool assembly includes:

[0025] S102: Using a first tool 10, install the first steel ball 210 into the first raceway 240 formed by the first core shaft 220 and the first outer ring 230, wherein the first tool 10 is a shell having a first cavity 110 and a vent hole 120 at the bottom;

[0026] S104: taking out the first mandrel 220 with the first outer ring 230 and the first steel ball 210 from the first tooling 10 and flipping it over to generate a second mandrel assembly 20;

[0027] S106: Assembling the second spindle assembly 20 to generate a third spindle assembly 30 , wherein the third spindle assembly 30 is a spindle assembly with a spring 310 ;

[0028] S108: Install the third mandrel assembly 30 into the second tooling 40 and apply a predetermined pressure to the third mandrel assembly 30 using the third tooling 50, wherein the second tooling 40 is a housing provided with a second cavity 410, and the third tooling 50 is a sleeve with a protrusion 510;

[0029] S110: Install the second steel ball 320 into the second raceway 340 formed by the third spindle assembly 30 and the second outer ring 330 using the fourth tool 60 , wherein the fourth tool 60 is a first C-shaped component provided with a step portion 610 ;

[0030] S112 : Replace the fourth tooling 60 with the second C-shaped component 350 , and generate the shaft-connecting bearing 70 .

[0031] As mentioned in the background, shaft-connected bearings, as a type of rotating structure, have smaller radial dimensions than conventional bearings for the same load capacity, and greater radial dimensions for the same load capacity. Due to their excellent rigidity and high rotational precision, they are widely used in a variety of industries, including medical devices, automotive water pumps, textile machinery, and aerospace.

[0032] With the increasing popularity and development of medical CT (i.e., X-ray computed tomography) imaging technology, the performance parameters and quality indicators of CT tubes—the main output device for X-rays—are being put to greater test than ever before. Bearings, as key components within the tube, play a vital role in improving CT tube performance. Bearings in CT tubes are generally of two types: liquid metal bearings and ball bearings. Ball bearings are generally designed to P4 grade and are high-speed, high-precision bearings that place extremely high demands on their design, processing, and assembly. Ball bearings are classified according to the preload method into either a positioning preload structure or a constant pressure preload structure.

[0033] However, since the existing shaft-connecting bearings often cannot ensure coaxiality during the assembly process, it often causes difficulty in rotation, thereby affecting the service life of the shaft-connecting bearings.

[0034] In view of this, first, the operator uses the first tool 10 to install the first steel ball 210 into the first raceway 240 formed by the first core shaft 220 and the first outer ring 230 (S102). Figure 2As shown, first, the operator installs the first mandrel 220 into the first fixture 10. The first fixture 10 is provided with a cavity 110, and the diameter of the cavity 110 of the first fixture 10 matches the diameter of the first mandrel 220. In addition, a stepped groove is provided on the top of the first fixture 10 for mounting the first outer ring 230 and the first steel ball 210.

[0035] The operator then installs the first outer ring 230 into the groove at the top of the first tooling 10, forming a first raceway 240 for receiving the first steel ball 210. The first raceway 240 is 0.05mm to 0.1mm larger than the diameter of the first steel ball 210. This size ensures that the first steel ball 210 fits snugly within the raceway 240 without falling out.

[0036] In addition, since the mating surface between the inner diameter of the first tooling 10 and the outer diameter of the first core shaft 220 is relatively long, it is very easy to form a vacuum environment at the bottom where the first tooling 10 and the first core shaft 220 are in contact, which is not conducive to gas discharge and may cause the gas to be not compressed in place. Therefore, it is necessary to set a vent hole 120 at the bottom of the first tooling 10 for discharging gas.

[0037] In addition, reference Figure 3 As shown, the operator installs the first steel ball 210 into the first raceway 240. Thus, the first outer ring 230 and the first steel ball 210 are installed.

[0038] Then, refer to Figure 4 As shown, the operator removes the first mandrel 220 with the first outer ring 230 and the first steel ball 210 from the first tool 10 and flips the first mandrel 220 with the first outer ring 230 and the first steel ball 210. The flipped first outer ring 230 is reset to generate the second mandrel assembly 20 (S104).

[0039] Furthermore, the operator assembles the second spindle assembly 20 , for example, by sleeve-mounting the spring 310 on the second spindle assembly 20 , thereby generating the third spindle assembly 30 ( S106 ).

[0040] In addition, the operator installs the third spindle assembly 30 into the second tool 40 and applies a predetermined pressure to the third spindle assembly 30 using the third tool 50 (S108). Figure 5 、 Figure 6 and Figure 7As shown, the operator first positions the third mandrel assembly 30 with the first outer ring 230 and first steel ball 210 facing the bottom of the second fixture 40 and then installs the third mandrel assembly into the second fixture 40. The second fixture 40 is a shell with a second cavity 410 and no vent holes at its bottom. A stepped recess is also provided at the top of the second fixture 40 for mounting the second outer ring 330 and second steel ball 320. The diameter of the third mandrel assembly 30 matches the inner diameter of the second fixture 40 to achieve a ratio of H7 / h8, ensuring perpendicularity during assembly.

[0041] In addition, reference Figure 5 As shown, the third tool 50 is a sleeve with a protrusion 510. Therefore, the operator inserts the protrusion 510 of the third tool 50 into the gap formed between the top groove of the second tool 40 and the third spindle assembly 30, thereby applying a predetermined pressure to the third spindle assembly 30 using the spring 310. Furthermore, the operator inserts the positioning pin 80 (i.e., the fifth tool 80) laterally into the second tool 40, thereby providing the necessary conditions for installing the fourth tool 60 (S110).

[0042] Furthermore, the operator uses the fourth tool 60 to install the second steel ball 320 into the second raceway 340 formed by the third spindle assembly 30 and the second outer ring 330 (S112). Figure 5 and Figure 6 As shown, first, the operator takes out the third tool 50, and then installs the fourth tool 60 in the groove at the top of the second tool 40. The fourth tool 60 is a first C-shaped component with a step portion 610, as shown in FIG. Figure 8 shown.

[0043] The operator then installs the second outer ring 330 on the stepped portion 610 of the fourth fixture 60, forming a second raceway for the second steel ball 320 between the second outer ring 330 and the third spindle assembly 30. The second raceway 340 should be 0.05mm to 0.1mm larger than the diameter of the second steel ball 320. To achieve this 0.05mm to 0.1mm larger diameter, the height of the fourth fixture 60 must be strictly controlled. Specifically, the height at which the second outer ring 330 is installed on the stepped portion 610 of the fourth fixture 60 ensures that the second raceway 340 is 0.05mm to 0.1mm larger than the diameter of the second steel ball 320. This ensures that the second steel ball 320 is securely secured within the second raceway 340 without falling out.

[0044] In addition, reference Figure 7As shown, the operator installs the second steel ball 320 into the second raceway 340. Thus, the second outer ring 330 and the second steel ball 320 are installed.

[0045] Finally, reference Figure 7 As shown, the operator inserts the second C-shaped component 350 while removing the fourth fixture 60, thereby producing the shaft-connected bearing 70. The height of the second C-shaped component 350 is lower than that of the fourth fixture 60, ensuring that the second C-shaped component 350 can smoothly replace the fourth fixture 60. Furthermore, to facilitate removal, both the second C-shaped component 350 and the fourth fixture 60 are configured in a C-shaped structure.

[0046] Because the technical solution of the present disclosure first uses the first tool 10 to load the first steel ball 210 into the first raceway 240 formed by the first mandrel 220 and the first outer ring 230, and then flips the first mandrel 220 with the first outer ring 230 and the first steel ball 210 to generate the second mandrel assembly 20, the first steel ball 210 is precisely located at the predetermined position of the first mandrel 220, and the size of the first raceway 240 between the first outer ring 230 and the first mandrel 220 matches the diameter of the second steel ball 320. Furthermore, after the third mandrel assembly 30 is loaded into the second tool 40, a predetermined pressure is applied to the third mandrel assembly 30 using the third tool 50, so that the third mandrel assembly 30 can precisely reach the predetermined position. Therefore, the size of the second raceway 340 formed by the third mandrel assembly 30 and the second outer ring 330 matches the size of the second steel ball 320. Therefore, the coaxiality of the first steel ball 210 and the second steel ball 320 is relatively good, and the first steel ball 210 is less likely to wear in the first raceway 240, and the second steel ball 320 is also less likely to wear in the second raceway 340. Thus, through the above operation, the coaxiality of the various components of the shaft coupling bearing 70 can be ensured, thereby ensuring the normal operation of the shaft coupling bearing 70 and ensuring the service life of the shaft coupling bearing 70. This solves the technical problem in the prior art that the existing shaft coupling bearing 70 often cannot maintain coaxiality during the assembly process, resulting in difficulty in rotation and thus shortening the service life of the shaft coupling bearing 70.

[0047] Optionally, the operation of using the first tooling 10 to load the first steel ball 210 into the first raceway 240 formed by the first core shaft 220 and the first outer ring 230 includes: loading the first core shaft 220 into the first tooling 10, and loading the first outer ring 230 into the first tooling 10, generating a first raceway 240 for installing the first steel ball 210, wherein the size of the first raceway 240 is 0.05mm to 0.1mm larger than the diameter of the first steel ball 210.

[0048] Specifically, refer to Figure 2 and Figure 3As shown, the first fixture 10 is provided with a cavity 110. The cavity 110 of the first fixture 10 is used to accommodate the first mandrel 220, so that the diameter of the cavity 110 of the first fixture 10 matches the diameter of the first mandrel 220. In addition, a stepped groove is provided at the top of the first fixture 10. When the first mandrel 220 is installed in the cavity 110 of the first fixture 10, a gap is formed between the top groove of the first fixture 10 and the first mandrel 220 to accommodate the first outer ring 230 and the first steel ball 210.

[0049] The operator then places the first outer ring 230 into the gap between the top groove of the first tooling 10 and the first mandrel 220. This creates a first raceway 240 between the flange of the first outer ring 230 and the first mandrel 220 for receiving the first steel ball 210. The first raceway 240 is 0.05mm to 0.1mm larger than the diameter of the first steel ball 210. This size ensures that the first steel ball 210 fits snugly within the raceway 240 without falling out.

[0050] Therefore, during the process of assembling the first outer ring 230 and the first steel ball 210, by controlling the size of the first raceway 240 so that the size of the first raceway 240 matches the diameter of the first steel ball 210, the technical effect of avoiding wear of the first steel ball 210 and thus ensuring the service life of the first steel ball 210 is achieved.

[0051] Optionally, the operation of loading the third spindle assembly 30 into the second jig 40 and applying a predetermined pressure to the third spindle assembly 30 using the third jig 50 includes: loading the third spindle assembly 30 into the second jig 40 and inserting the third jig 50 into a gap between the second jig 40 and the third spindle assembly 30; and applying a predetermined pressure to the third spindle assembly 30 using the third jig 50. Further optionally, the operation further includes: fixing the third spindle assembly 30 in a predetermined position using a fifth jig 80, wherein the predetermined position is the position of the third spindle assembly 30 relative to the second jig 40 when the predetermined pressure is applied to the third spindle assembly 30.

[0052] Specifically, refer to Figure 5 As shown, after the second spindle assembly 220 is assembled, the third spindle assembly 30 is generated. The operator installs the third spindle assembly 30 into the second tooling 40, so that a gap is formed between the third spindle assembly 30 and the top groove of the second tooling 40. The protrusion 510 of the third tooling 50 can just be inserted into the gap formed between the third spindle assembly 30 and the top groove of the second tooling 40, and the operator uses the third tooling 50 to apply a predetermined pressure to the third spindle assembly 30.

[0053] Then, the operator inserts the positioning pin 80 into the second tooling 40 laterally and fixes the position of the third spindle assembly 30 .

[0054] Thus, by applying a predetermined pressure to the third spindle assembly 30 using the third tooling 50 and fixing the position of the third spindle assembly 30 using the fifth tooling 80, a technical effect of providing the necessary conditions for installing the fourth tooling 60 is achieved.

[0055] Optionally, the method further includes: taking out the third tooling 50 , and placing the fourth tooling 60 into the gap between the second tooling 40 and the third spindle assembly 30 .

[0056] Specifically, refer to Figure 5 、 Figure 6 and Figure 7 As shown, the operator fixes the position of the third spindle assembly 30 using the fifth tool 80, removes the third tool 50, and places the fourth tool 60 into the gap formed between the top groove of the second tool 40 and the third spindle assembly 30. Figure 8 As shown, the fourth tool 60 is a first C-shaped component provided with a step portion 610, so that the fourth tool 60 can be taken out smoothly.

[0057] Optionally, the operation of using the fourth tooling 60 to install the second steel ball 320 into the second raceway 340 formed by the third core shaft assembly 30 and the second outer ring 330 includes: installing the second outer ring 330 into the gap between the fourth tooling 60 and the third core shaft assembly 30 to generate a second raceway 340 for installing the second steel ball 320, wherein the size of the second raceway 340 is 0.05mm to 0.1mm larger than the diameter of the second steel ball 320.

[0058] Specifically, refer to Figure 6 or Figure 7 As shown, after installing the fourth fixture 60 into the gap formed between the top groove of the second fixture 40 and the third spindle assembly 30, the operator then installs the second outer ring 330 into the gap formed between the fourth fixture 60 and the third spindle assembly 30. This creates a second raceway 340 between the second outer ring 330 and the third spindle assembly 30 for mounting the second steel ball 320. The second raceway 340 is 0.05 mm to 0.1 mm larger than the diameter of the second steel ball 320. This size ensures that the second steel ball 320 fits snugly within the raceway 340 without falling out.

[0059] Therefore, during the process of assembling the second outer ring 330 and the second steel ball 320, by controlling the size of the second raceway 340 so that the size of the second raceway 340 matches the diameter of the second steel ball 320, the technical effect of avoiding wear of the second steel ball 320 and thus ensuring the service life of the second steel ball 320 is achieved.

[0060] Advantages of this application include:

[0061] 1. By controlling the axial dimension of the core shaft, the present application can smoothly install the first steel ball 210 into the first raceway 240 and the second steel ball 320 into the second raceway 340;

[0062] 2. Through radial positioning, the first steel ball 210 can automatically reset itself into the first raceway 240, and the second steel ball 320 can automatically reset itself into the second raceway 340, thereby avoiding scratches between the first steel ball 210 and the first raceway 240, and scratches between the second steel ball 320 and the second raceway 340; and

[0063] 3. The present application can effectively avoid the situation where the coaxiality of the components of the shaft-connected bearing 70 is not high during the assembly process through radial positioning.

[0064] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0066] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0067] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for assembling a shaft-bearing by using a tool, characterized in that: include: A first steel ball (210) is installed into a first raceway (240) formed by a first core shaft (220) and a first outer ring (230) using a first tool (10), wherein the first tool (10) is a shell provided with a first cavity (110) and a vent hole (120) at the bottom; Taking out the first mandrel (220) with the first outer ring (230) and the first steel ball (210) from the first tooling (10), and turning it over to generate a second mandrel assembly (20); Assembling the second core shaft assembly (20) to generate a third core shaft assembly (30), wherein the third core shaft assembly (30) is a core shaft assembly with a spring (310); The third spindle assembly (30) is installed in a second tool (40), and a predetermined pressure is applied to the third spindle assembly (30) by using a third tool (50), wherein the second tool (40) is a shell provided with a second cavity (410), and the third tool (50) is a sleeve with a protrusion (510), and the method further includes: fixing the third spindle assembly (30) at a predetermined position by using a fifth tool (80), wherein the predetermined position is the position of the third spindle assembly (30) relative to the second tool (40) when the predetermined pressure is applied to the third spindle assembly (30); Using a fourth tool (60), the second steel ball (320) is installed into a second raceway (340) formed by the third spindle assembly (30) and the second outer ring (330), wherein the fourth tool (60) is a first C-shaped component provided with a step portion (610); as well as The fourth tooling (60) is replaced with a second C-shaped component (350), and the shaft-connecting bearing (70) is produced.

2. The method according to claim 1, characterized in that The operation of using the first tool (10) to install the first steel ball (210) into the first raceway (240) formed by the first core shaft (220) and the first outer ring (230) includes: The first core shaft (220) is installed in the first tooling (10), and the first outer ring (230) is installed in the first tooling (10) to generate a first raceway (240) for mounting the first steel ball (210), wherein the size of the first raceway (240) is 0.05 mm to 0.1 mm larger than the diameter of the first steel ball (210).

3. The method according to claim 2, characterized in that The operation of placing the third mandrel assembly (30) into the second tooling (40) and applying a predetermined pressure to the third mandrel assembly (30) using the third tooling (50) comprises: Installing the third spindle assembly (30) into the second tooling (40), and inserting the third tooling (50) into the gap between the second tooling (40) and the third spindle assembly (30); and The predetermined pressure is applied to the third core shaft assembly (30) using the third tool (50).

4. The method according to claim 3, characterized in that The method further includes: taking out the third tool (50) and placing the fourth tool (60) into the gap between the second tool (40) and the third spindle assembly (30).

5. The method according to claim 4, characterized in that The operation of using the fourth tool (60) to install the second steel ball (320) into the second raceway (340) formed by the third core shaft assembly (30) and the second outer ring (330) includes: The second outer ring (330) is installed in the gap between the fourth tooling (60) and the third core shaft assembly (30) to generate a second raceway (340) for mounting the second steel ball (320), wherein the size of the second raceway (340) is 0.05 mm to 0.1 mm larger than the diameter of the second steel ball (320).

Images